deleteOldRevisions.php

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<?php
require_once( __DIR__ . '/Maintenance.php' );

class DeleteOldRevisions extends Maintenance {
        public function __construct() {
                parent::__construct();
                $this->mDescription = "Delete old (non-current) revisions from the database";
                $this->addOption( 'delete', 'Actually perform the deletion' );
                $this->addOption( 'page_id', 'List of page ids to work on', false );
        }

        public function execute() {
                $this->output( "Delete old revisions\n\n" );
                $this->doDelete( $this->hasOption( 'delete' ), $this->mArgs );
        }

        function doDelete( $delete = false, $args = array() ) {

                # Data should come off the master, wrapped in a transaction
                $dbw = wfGetDB( DB_MASTER );
                $dbw->begin( __METHOD__ );

                $pageConds = array();
                $revConds = array();

                # If a list of page_ids was provided, limit results to that set of page_ids
                if ( count( $args ) > 0 ) {
                        $pageConds['page_id'] = $args;
                        $revConds['rev_page'] = $args;
                        $this->output( "Limiting to page IDs " . implode( ',', $args ) . "\n" );
                }

                # Get "active" revisions from the page table
                $this->output( "Searching for active revisions..." );
                $res = $dbw->select( 'page', 'page_latest', $pageConds, __METHOD__ );
                $latestRevs = array();
                foreach ( $res as $row ) {
                        $latestRevs[] = $row->page_latest;
                }
                $this->output( "done.\n" );

                # Get all revisions that aren't in this set
                $this->output( "Searching for inactive revisions..." );
                if ( count( $latestRevs ) > 0 ) {
                        $revConds[] = 'rev_id NOT IN (' . $dbw->makeList( $latestRevs ) . ')';
                }
                $res = $dbw->select( 'revision', 'rev_id', $revConds, __METHOD__ );
                $oldRevs = array();
                foreach ( $res as $row ) {
                        $oldRevs[] = $row->rev_id;
                }
                $this->output( "done.\n" );

                # Inform the user of what we're going to do
                $count = count( $oldRevs );
                $this->output( "$count old revisions found.\n" );

                # Delete as appropriate
                if ( $delete && $count ) {
                        $this->output( "Deleting..." );
                        $dbw->delete( 'revision', array( 'rev_id' => $oldRevs ), __METHOD__ );
                        $this->output( "done.\n" );
                }

                # This bit's done
                # Purge redundant text records
                $dbw->commit( __METHOD__ );
                if ( $delete ) {
                        $this->purgeRedundantText( true );
                }
        }
}

$maintClass = "DeleteOldRevisions";
require_once( RUN_MAINTENANCE_IF_MAIN );